Company lists · Data refreshed September 2026

Top 25 Enterprise security marketing agencies based in the United Kingdom

Name: Enterprise security marketing agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 638 companies tracked

RevenueBase identified 638 enterprise security marketing agencies headquartered in the United Kingdom as of September 2026 and tracks 5,746 professional contacts across them, including 1,969 with verified work emails. London is the largest hub.

This list covers enterprise security marketing agencies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

638Companies

5,746Contacts tracked

1,969Verified emails

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The 25 largest enterprise security marketing agencies based in the United Kingdom

Ranked by team size

Top 25 of 638 enterprise security marketing agencies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise security marketing agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Securityhq	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	502 contacts →
	Partial evidence “SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Source: RevenueBase Database · checked Sep 28, 2026
2	Harvard	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	213 contacts →
	Partial evidence “Harvard is an award-winning integrated Marketing and PR agency for tech brands big and small, with a full-service offering including: media and analyst relations, marketing…” Source: RevenueBase Database · checked Sep 28, 2026
3	BWP	Partial evidence	Marlow, United KingdomHQ checked Sep 28, 2026	51-200	130 contacts →
	Partial evidence “We deliver marketing that drives real business impact in our core sectors; retail destinations, leisure & attractions, and wines & spirits.” Source: RevenueBase Database · checked Sep 28, 2026
4	Khipu Networks	Partial evidence	Fleet, United KingdomHQ checked Sep 28, 2026	51-200	125 contacts →
	Partial evidence “KHIPU Networks is an award winning international Cyber Security Company delivering a wide range of network, wireless and security solutions, technologies and services across…” Source: RevenueBase Database · checked Sep 28, 2026
5	Bulletproof Cyber Security	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	123 contacts →
	Indirect evidence “Bulletproof is now part of WorkNest Secure.” Source: RevenueBase Database · checked Sep 28, 2026
6	Total Security Protection LTD	Strong evidence	Watford, United KingdomHQ checked Sep 28, 2026	51-200	116 contacts →
	Strong evidence “TSP has a reputation for providing enterprise security solutions, as well as excellent system integration standards and exceptional aftercare support, since its founding in 1988.” Source: RevenueBase Database · checked Sep 28, 2026
7	Pursuit Marketing	Partial evidence	Glasgow, United KingdomHQ checked Sep 28, 2026	51-200	96 contacts →
	Partial evidence “Pursuit Marketing are Experts in Demand Generation, Telemarketing, Digital Marketing and Creative Design - your 360 Marketing Provider.” Source: RevenueBase Database · checked Sep 28, 2026
8	FOX Agency	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	95 contacts →
	Indirect evidence “Fox Agency is an integrated agency for global B2B tech brands on a mission: To grow, expand, transform, accelerate, go-to-market, get investment.” Source: RevenueBase Database · checked Sep 28, 2026
9	Cybanetix	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	79 contacts →
	Partial evidence “Cybanetix is a leading provider of managed Cyber Security Service and hosted SIEM and breach detection services.” Source: RevenueBase Database · checked Sep 28, 2026
10	Stickyeyes	Partial evidence	Leeds, United KingdomHQ checked Sep 28, 2026	201-500	77 contacts →
	Partial evidence “Search Marketing \| Content \| Strategy Delivered by passionate people.” Source: RevenueBase Database · checked Sep 28, 2026
11	OTM Create	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	62 contacts →
	Partial evidence “OTM is a creative marketing agency for financial services, B2B technology and public sector companies.[Please Note, we have NO connection with Oracle Transportation Management]…” Source: RevenueBase Database · checked Sep 28, 2026
12	MDSEC	Partial evidence	Macclesfield, United KingdomHQ checked Sep 28, 2026	11-50	61 contacts →
	Partial evidence “MDSec are a UK based consultancy with a passion for information security.” Source: RevenueBase Database · checked Sep 28, 2026
13	AML Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	59 contacts →
	Indirect evidence “AML does simple ideas for a complicated world.” Source: RevenueBase Database · checked Sep 28, 2026
14	Cyberlab	Strong evidence	Alderley Edge, United KingdomHQ checked Sep 28, 2026	51-200	57 contacts →
	Strong evidence “CyberLab is the UK-leading cyber security consultancy and managed services provider, trusted by over 1,200 enterprise businesses, government departments, and household names to…” Source: RevenueBase Database · checked Sep 28, 2026
15	Bright Blue DAY LTD	Indirect evidence	Bournemouth, United KingdomHQ checked Sep 28, 2026	51-200	51 contacts →
	Indirect evidence “We’re not just a creative agency; we’re your unfair advantage.” Source: RevenueBase Database · checked Sep 28, 2026
16	BIG Picture UK	Partial evidence	Brook Green, United KingdomHQ checked Sep 28, 2026	51-200	47 contacts →
	Partial evidence “We are Industry-leading experts in digtal, field, channel, and experiential marketing for consumer electronics & technology.” Source: RevenueBase Database · checked Sep 28, 2026
17	Satisnet, A Gamma Company	Partial evidence	Luton, United KingdomHQ checked Sep 28, 2026	51-200	45 contacts →
	Partial evidence “Established in 2004 (acquired by Gamma in 2023), Satisnet, a Gamma company is a pedigree-proven cyber security services and solutions specialist with a fully UK-based 24x7x365 SOC.” Source: RevenueBase Database · checked Sep 28, 2026
18	KD WEB	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	44 contacts →
	Partial evidence “KD Web is an award winning internet marketing, web design and creative agency, providing SEO, polished website design, Ecommerce and CMS systems as well as branding and graphic…” Source: RevenueBase Database · checked Sep 28, 2026
19	Plug And Play	Partial evidence	Guildford, United KingdomHQ checked Sep 28, 2026	11-50	41 contacts →
	Partial evidence “Plug and Play® is a team of digital marketing professionals who understand the importance of combining good technology with creative design.” Source: RevenueBase Database · checked Sep 28, 2026
20	CPB UK LTD	Partial evidence	Banbury, United KingdomHQ checked Sep 28, 2026	11-50	39 contacts →
	Partial evidence “CPB UK - Causing People To Buy Established in 1998, CPB has many years experience of delivering integrated marketing campaigns for VARs, Integrators, MSPs, Distributors &…” Source: RevenueBase Database · checked Sep 28, 2026
21	Omerta	Partial evidence	Saffron Walden, United KingdomHQ checked Sep 28, 2026	51-200	38 contacts →
	Partial evidence “Omerta - A Global Security Technology and Services Company.” Source: RevenueBase Database · checked Sep 28, 2026
22	Ergos UK	Indirect evidence	Crawley, United KingdomHQ checked Sep 28, 2026	11-50	35 contacts →
	Indirect evidence “ERGOS is an award-winning IT Managed Service Provider.” Source: RevenueBase Database · checked Sep 28, 2026
23	Cyberis	Partial evidence	Tewkesbury, United KingdomHQ checked Sep 28, 2026	11-50	34 contacts →
	Partial evidence “Cyberis are pioneers in customer-focussed information security.” Source: RevenueBase Database · checked Sep 28, 2026
24	Velocity Partners	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	32 contacts →
	Partial evidence “B2B marketing has a big pipeline problem.” Source: RevenueBase Database · checked Sep 28, 2026
25	YOC	Indirect evidence	Hounslow, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Indirect evidence “Your Online Conversation Limited is an information technology and services company based out of the United Kingdom.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: enterprise security marketing agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names enterprise security marketing agencies.
Partial evidence: Its own public description names part of enterprise security marketing agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise security marketing agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 638 enterprise security marketing agencies based in the United Kingdom

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Enterprise security marketing agencies based in the United Kingdom at a glance

As of Sep 28, 2026

34.3%Verified-email coverage

9.0Average contacts per company

1-10Median size (employees)

33.1%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

425

11-50

171

51-200

201-500

501-1,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 638 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among enterprise security marketing agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “enterprise security marketing agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names enterprise security marketing agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among enterprise security marketing agencies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 1,969 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Enterprise security marketing agencies by metro

Enterprise security marketing agencies in London211

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names enterprise security marketing agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many enterprise security marketing agencies are there based in the United Kingdom?

RevenueBase identified 638 enterprise security marketing agencies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Securityhq, headquartered in Gb, tops this list with the largest team on record.

Which city has the most enterprise security marketing agencies?

London leads with 211 headquartered companies, followed by Manchester (23) and Leeds (16).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,969 verified decision-maker contacts tracked across these 638 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.